By default, PyROOT will send sys.argv to TApplication for the
arguments to be parsed. User arguments for the Python script
can be passed after a "-" or "--" in the command line and
they will be ignored by PyROOT.

The user can disable the aforementioned argument parsing by
adding a configuration option before any lookup in the ROOT module:
> import ROOT
> ROOT.PyConfig.IgnoreCommandLineOptions = True